After years of delivering faster and faster chips that can easily boost the performance of most desktop software, Intel says the free ride is over. Already, chipmakers like Intel and AMD are delivering processors that have multiple brains, or cores, rather than single brains that run ever faster. The challenge is that most of today's software isn't built to handle that kind of advance. "The software has to also start following Moore's law," Intel fellow Shekhar Borkar said, referring to the notion that chips offer roughly double the performance every 18 months to two years. "Software has to double the amount of parallelism that it can support every two years."